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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">proneft</journal-id><journal-title-group><journal-title xml:lang="ru">PROНЕФТЬ. Профессионально о нефти</journal-title><trans-title-group xml:lang="en"><trans-title>PROneft. Professionally about Oil</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2587-7399</issn><issn pub-type="epub">2588-0055</issn><publisher><publisher-name>«Газпром нефть»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.51890/2587-7399-2022-7-4-68-82</article-id><article-id custom-type="elpub" pub-id-type="custom">proneft-383</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ГЕОЛОГИЯ И ГЕОЛОГО-РАЗВЕДОЧНЫЕ РАБОТЫ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>GEOLOGY AND EXPLORATIONS</subject></subj-group></article-categories><title-group><article-title>Особенности формирования вторичных коллекторов в карбонатных отложениях палеозоя Западно-Таймырского потенциально нефтегазоносного района</article-title><trans-title-group xml:lang="en"><trans-title>Development of the diagenetic reservoirs in the Paleozoic carbonate deposits of the West Taimyr potential oil and gas bearing area</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9661-1708</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ершова</surname><given-names>В. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Ershova</surname><given-names>V. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Виктория Бэртовна Ершова — кандидат геолого-минералогических наук, доцент</p><p>199155, Россия, г. Санкт-Петербург, пер. Декабристов, д. 16аSPIN-код: 1475-0720  Scopus ID: 15519189300 </p></bio><bio xml:lang="en"><p>Viktoria B. Ershova — Сand. Sci. (Geol.-Min.), Associate Professor</p><p>16A Dekabristov lane, 199155, Saint Petersburg, RussiaSPIN-code: 1475-0720  Scopus ID: 15519189300 </p></bio><email xlink:type="simple">v.ershova@spbu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7766-5674</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Васильева</surname><given-names>К. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Vasileva</surname><given-names>K. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ксения Юрьевна Васильева — кандидат геолого-минералогических наук, доцент</p><p>199155, Россия, г. Санкт-Петербург, пер. Декабристов, д. 16аSPIN-код: 1139-0472  Scopus ID: 5719 3951587 </p></bio><bio xml:lang="en"><p>Kseniia Yu. Vasileva — Сand. Sci. (Geol.-Min.), Associate Professor</p><p>16A, Dekabristov lane, 199155, Saint Petersburg, RussiaSPIN-code: 1139-0472  Scopus ID: 5719 3951587 </p></bio><email xlink:type="simple">k.vasilyeva@spbu.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5515-4558</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Вилесов</surname><given-names>А. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Vilesov</surname><given-names>A. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Петрович Вилесов — кандидат геолого-минералогических наук, эксперт по седиментологии карбонатных резервуаров</p><p>190000, Россия, г. Санкт-Петербург, Набережная реки Мойки, д. 75–79, литер ДSPIN-код: 7589-6500    Scopus ID: 57198131907 </p></bio><bio xml:lang="en"><p>Aleksandr P. Vilesov — Сand. Sci. (Geol.-Min.), Expert on the sedimentology of carbonate reservoirs</p><p>75–79 liter D, Moika River emb., 190000, Saint Petersburg, RussiaSPIN-code: 7589-6500  Scopus ID: 57198131907 </p></bio><email xlink:type="simple">Vilesov.AP@gazpromneft-ntc.ru</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5854-4332</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Михайлова</surname><given-names>К. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Mikhailova</surname><given-names>K. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ксения Юрьевна Михайлова —  инженер-исследователь</p><p>199155, Россия, г. Санкт-Петербург, пер. Декабристов, д. 16аScopus ID: 57222199058 </p></bio><bio xml:lang="en"><p>Kseniya Yu. Mikhailova — Researcher16A, Dekabristov lane, 199155, Saint Petersburg, RussiaSPIN-code: 8652-6046  Scopus ID: 57222199058 </p></bio><email xlink:type="simple">mikhailova.ky@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4811-2269</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Верещагин</surname><given-names>О. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Vereshchagin</surname><given-names>O. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Олег Сергеевич Верещагин — кандидат геолого-минералогических наук, доцент</p><p>199155, Россия, г. Санкт-Петербург, пер. Декабристов, д. 16аSPIN-код: 1030-0437   Scopus ID: 54953306700 </p></bio><bio xml:lang="en"><p>Oleg S. Vereshchagin — Сand. Sci. (Geol.-Min.), Associate Professor</p><p>16A, Dekabristov lane, 199155, Saint Petersburg, RussiaSPIN-code: 1030-0437  Scopus ID: 54953306700 </p></bio><email xlink:type="simple">o.vereshchagin@spbu.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Санкт-Петербургский государственный университет;&#13;
Геологический институт Российской академии наук</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Saint Petersburg State University;&#13;
Geological Institute of Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Санкт-Петербургский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Saint Petersburg State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Научно-Технический Центр «Газпром нефти» (ООО «Газпромнефть НТЦ»)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Gazpromneft STC LLC</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>29</day><month>12</month><year>2022</year></pub-date><volume>7</volume><issue>4</issue><fpage>68</fpage><lpage>82</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ершова В.Б., Васильева К.Ю., Вилесов А.П., Михайлова К.Ю., Верещагин О.С., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Ершова В.Б., Васильева К.Ю., Вилесов А.П., Михайлова К.Ю., Верещагин О.С.</copyright-holder><copyright-holder xml:lang="en">Ershova V.B., Vasileva K.Y., Vilesov A.P., Mikhailova K.Y., Vereshchagin O.S.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://proneft.elpub.ru/jour/article/view/383">https://proneft.elpub.ru/jour/article/view/383</self-uri><abstract><p>Введение. Мощный осадочный комплекс палеозоя Енисей-Хатангской нефтегазоносной области имеет сложную геологическую историю. Карбонатные породы, слагающие значительную часть палеозойского разреза, несут в себе следы разнообразных вторичных изменений, которые имеют как положительное, так и отрицательное влияние на фильтрационно-емкостные свойства потенциальных коллекторов. Особое значение при геолого-разведочных работах на нефть и газ в карбонатных толщах имеет изучение постседиментационных изменений карбонатных коллекторов и увязка этих изменений с этапами тектонической эволюции региона. Это позволяет решать вопросы генезиса пустотного пространства и делать выводы о распространении коллекторов. В результате бурения первой поисковой скважины на Лескинском лицензионном участке в левобережье Енисейского залива получена уникальная информация о составе, строении и вторичных преобразованиях карбонатных коллекторов палеозоя ЗападноТаймырского потенциально нефтегазоносного района.Материалы и методы. В скважине на Лескинском лицензионном участке на нескольких стратиграфических уровнях палеозойского разреза по керну выделены интервалы вторичных доломитовых коллекторов. С целью изучения истории их формирования был выполнен отбор образцов. Для всестороннего изучения литологии, минерального состава и диагенетических преобразований пород-коллекторов был привлечен широкий комплекс лабораторных методов. Образцы были изучены с помощью оптических методов (петрографической и катодолюминесцентной микроскопии), растровой электронной микроскопии, микротомографии, получены данные о стабильных изотопах кислорода и углерода, а также предварительные данные по термобарометрии двухфазных газово-жидких включений.Результаты. Наиболее значимые интервалы распространения вторичных доломитовых коллекторов выделены в силурийско-нижнедевонском и эмсско-верхнедевонском сейсмостратиграфических комплексах (между отражающими горизонтами VII_bot и VIIa, VIa и VII соответственно). Силурийские вторичные порово-каверновые доломитовые коллекторы приурочены к фациям рифового комплекса. Развитая система хорошо связанных вторичных пустот сформировалась по первично пористым и хорошо проницаемым рифогенным известнякам. В эмсском интервале разреза кавернозные вторичные доломиты развиты по первично низкопроницаемым известнякам умеренно глубокой сублиторали; крупные каверны и полости сформировались здесь преимущественно в результате выщелачивания скелетов кораллов и строматопороидей. В верхнедевонских отложениях кавернозно-пористые вторичные доломиты замещают первично низкопористые и слабопроницаемые микробиальные известняки-ламиниты литорали. Для всех интервалов пород-коллекторов реконструирована последовательность вторичных изменений и составлены парагенетические диаграммы.Заключение. Результаты изучения вторичных доломитовых коллекторов содержат важную информацию для прогноза их распространения в пределах Западно-Таймырского потенциально нефтегазоносного района.</p></abstract><trans-abstract xml:lang="en"><p>Introduction. The Paleozoic sedimentary series of the Enisey-Khatanga oil and gas bearing region has undergone a complicated geological history. Carbonate rocks composing significant volume of the strata show various traces of the secondary alterations that have both positive and negative effects on the reservoir properties of the carbonate rocks. Of particular importance in the exploration of oil and gas in carbonate depositional systems is the study of post-sedimentary changes in carbonate reservoirs and linking these changes with the stages of tectonic evolution of the region. This allows to solve the questions of reservoirs genesis and make conclusions about their spatial distribution. During the studies of the carbonate rocks in the first exploration well (Leskinsky license area on the left bank of the Enisey Bay) unique information was obtained on the composition and secondary transformations of Paleozoic carbonate reservoirs of the West Taimyr potential oil and gas bearing area.Materials and methods. In the well the secondary dolomite reservoir rocks were described within several stratigraphic units; samples from that section were obtained for the detailed studies using a complex of instrumental methods. The samples were studied using standard optical (petrography and cathodoluminescence) microscopy, SEM-EDX, microtomography, data on stable isotope composition and thermobarometry of the twophase gas-liquid inclusions was obtained.Results. The main intervals of the dolomite reservoirs were found in the Silurian — Lower Devonian and Emsian — Upper Devonian seismostratigraphic units (between reflecting horizons VII_bot и VIIa, VIa и VII, respectively). Silurian secondary porous and cavernous dolostones are dedicated to reef series. A system of well-connected secondary voids has formed over primary porous and well-permeable reef limestones. In the Emsian strata low-permeable limestones of shallow-deep subtidal were replaced by dolostones with separate vug porosity. Pore space here was formed due to fracturing and leaching of corals and stromatoporoid skeletons. The Upper Devonian dolostones were formed during the replacement of low-permeable microbial bindstones of the peritydal flat. For all the intervals diagenetic history was reconstructed and paragenetic diagrams were put together.Conclusion. The results of the study of diagenetic dolomite reservoirs contain important information for predicting their distribution within the West Taimyr potential oil and gas bearing area.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Енисей-Хатангская нефтегазоносная область</kwd><kwd>Западный Таймыр</kwd><kwd>палеозой</kwd><kwd>вторичные карбонатные коллекторы</kwd><kwd>доломиты</kwd><kwd>постседиментационные изменения</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Enisey-Khatanga oil and gas bearing region</kwd><kwd>West Taimyr</kwd><kwd>Paleozoic</kwd><kwd>diagenetic carbonate reservoirs</kwd><kwd>dolostone</kwd><kwd>post-sedimentary alterations</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Авторы благодарят ресурсные центры СПБГУ «Рентгенодифракционные методы исследования» и «Геомодель» за помощь в проведении аналитических исследований.</funding-statement><funding-statement xml:lang="en">The authors thank the resource centers of the SPBSU “Centre for X-ray Diffraction Studies” and “Geomodel” for their help in conducting analytical research.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Ahr W.M. 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